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https://www.readbyqxmd.com/read/29178709/determination-of-polymerization-shrinkage-of-different-composites-using-a-photoelastic-method
#1
Inga Rullman, Michael Patyna, Bram Janssen, Brita Willershausen
PURPOSE: To investigate the polymerization shrinkage stress of different low viscous bulk composites (SDR, Venus Bulk Fill, X-tra Base, Filtek Bulk Fill) in comparison to a conventional flowable composite (Filtek Supreme XTE Flow) and to high viscous bulk and conventional composites (Filtek Supreme XTE, GrandioSO, Tetric EvoCeram, Tetric EvoCeram BulkFill, Venus Diamond, Venus Pearl), as well as to an experimental composite (Ormocer) and a sonic-activated bulk fill composite (Sonicfill), by means of photoelastic investigation...
February 2017: American Journal of Dentistry
https://www.readbyqxmd.com/read/29176302/influence-of-increment-thickness-on-radiant-energy-and-microhardness-of-bulkfill-resin-composites
#2
Gamze Karacolak, L Sebnem Turkun, Hayal Boyacioglu, Jack L Ferracane
Determining the energy transferred at the bottom of eleven bulk-fill resin composites, comparing top and bottom microhardness's and evaluating the correlation between microhardness and radiant energy were aimed. Samples were placed over the bottom sensor of a visible light transmission spectrophotometer and polymerized for 20 s. The bottom and top Knoop microhardness were measured. Paired t-test and correlation analysis were used for statistics (p≤0.05). In all groups, the bottom radiant energy decreased significantly with increasing thickness...
November 23, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28969277/effect-of-different-composite-restorations-on-the-cuspal-deflection-of-premolars-restored-with-different-insertion-techniques-an-in-vitro-study
#3
Sakshi Singhal, Anuraag Gurtu, Anurag Singhal, Rashmi Bansal, Sumit Mohan
INTRODUCTION: This study was conducted to assess the effect of different composite materials on the cuspal deflection of premolars restored with bulk placement of resin composite in comparison to horizontal incremental placement and modified tangential incremental placement. AIM: The aim of this study was to evaluate the cuspal deflection caused by different composite materials when different insertion techniques were used. MATERIALS AND METHODS: Two different composite materials were used that is Tetric N Ceram (Ivoclar Vivadent marketing, India) and SonicFill(TM) (Kerr Sybron Dental)...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28956844/the-influence-of-water-sorption-of-dental-light-cured-composites-on-shrinkage-stress
#4
Kinga Bociong, Agata Szczesio, Krzysztof Sokolowski, Monika Domarecka, Jerzy Sokolowski, Michal Krasowski, Monika Lukomska-Szymanska
The contraction stress generated during the photopolymerization of resin dental composites is the major disadvantage. The water sorption in the oral environment should counteract the contraction stress. The purpose was to evaluate the influence of the water sorption of composite materials on polymerization shrinkage stress generated at the restoration-tooth interface. The following materials were tested: Filtek Ultimate, Gradia Direct LoFlo, Heliomolar Flow, Tetric EvoCeram, Tetric EvoCeram Bulk Fill, Tetric EvoFlow, Tetric EvoFlow Bulk Fill, X-tra Base, Venus BulkFil, and Ceram...
September 28, 2017: Materials
https://www.readbyqxmd.com/read/28626204/intrapulpal-temperature-changes-during-curing-of-different-bulk-fill-restorative-materials
#5
Elif Yasa, Cigdem Atalayin, Gamze Karacolak, Tugrul Sari, L Sebnem Turkun
The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded...
September 26, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28576660/impact-of-light-transmittance-mode-on-polymerisation-kinetics-in-bulk-fill-resin-based-composites
#6
Nicoleta Ilie
OBJECTIVES: to determine the mode of light transmission and its impact on the polymerisation kinetic in modern bulk-fill resin-based composites (B-RBC). MATERIALS AND METHODS: Four low-viscosity methacrylate-based and one high-viscosity ormocer-based B-RBCs were considered. One material was available in three different shades that were all analyzed. Polymerization kinetic and light transmittance were assessed in 2 and 4mm specimen depths. Incident and transmitted irradiance and radiant exposure were measured in real-time on a laboratory-grade spectrometer...
May 30, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28443833/bulk-fill-composites-a-review-of-the-current-literature
#7
Annelies Van Ende, Jan De Munck, Diogo Pedrollo Lise, Bart Van Meerbeek
PURPOSE: The aim of this article was to provide an overview of the literature on the currently available bulk-fill composites, and to describe the common trends as well as the wide variations. The findings may help the clinician to select the proper material with regard to its applicability in various clinical situations. METHODS: The literature up to October 2016 was reviewed based on a PubMed search (keywords: "bulk-fill OR bulkfill OR bulk fill" AND "composite OR composites")...
2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28402737/comparison-of-polymerization-shrinkage-physical-properties-and-marginal-adaptation-of-flowable-and-restorative-bulk-fill-resin-based-composites
#8
J H Jung, S H Park
PURPOSE: The purpose of this study was to compare the marginal adaptation of two flowable bulk fill resin-based composites (FB-RBCs), two restorative bulk fill resin-based composites (RB-RBCs), and one regular incremental-fill RBC in MOD cavities in vitro. Additionally, the influence of linear polymerization shrinkage, shrinkage force, flexural modulus, and bottom/top surface hardness ratio on the marginal adaptation was evaluated. METHODS: A Class II MOD cavity was prepared in 40 extracted sound lower molars...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28298988/bond-strength-of-dental-nanocomposites-repaired-with-a-bulkfill-composite
#9
Uzay Koç-Vural, Leyla Kerimova, İsmail H Baltacioglu, Arlin Kiremitçi
BACKGROUND: The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites. MATERIAL AND METHODS: Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27889605/posterior-composites-update-on-cavities-and-filling-techniques
#10
J Sabbagh, R J McConnell, M Clancy McConnell
OBJECTIVES: The aim of this paper is to examine cavity design for posterior resin composite restorations and to discuss various resin composite filling techniques. DATA: Literature with regard to cavity preparation for amalgam and resin composite restorations has been reviewed. An overview of available bulkfill resin composite systems is provided and a categorization of these systems according to their clinical application and their intended use is outlined. SOURCES: A literature search was carried out by the authors in Medline...
February 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/27836116/effect-of-layer-thickness-on-the-elution-of-bulk-fill-composite-components
#11
Lena Rothmund, Franz-Xaver Reichl, Reinhard Hickel, Panorea Styllou, Marianthi Styllou, Kai Kehe, Yang Yang, Christof Högg
OBJECTIVE: An increment layering technique in a thickness of 2mm or less has been the standard to sufficiently convert (co)monomers. Bulk fill resin composites were developed to accelerate the restoration process by enabling up to 4mm thick increments to be cured in a single step. The aim of the present study is to investigate the effect of layer thickness on the elution of components from bulk fill composites. METHODS: The composites ELS Bulk fill, SDR Bulk fill and Venus Bulkfill were polymerized according to the instruction of the manufacturers...
January 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27486505/fracture-resistance-of-endodontically-treated-teeth-restored-with-a-bulkfill-flowable-material-and-a-resin-composite
#12
Almira Isufi, Gianluca Plotino, Nicola Maria Grande, Pietro Ioppolo, Luca Testarelli, Rossella Bedini, Dina Al-Sudani, Gianluca Gambarini
AIM: To determine and compare the fracture resistance of endodontically treated teeth restored with a bulk fill flowable material (SDR) and a traditional resin composite. METHODS: Thirty maxillary and 30 mandibular first molars were selected based on similar dimensions. After cleaning, shaping and filling of the root canals and adhesive procedures, specimens were assigned to 3 subgroups for each tooth type (n=10): Group A: control group, including intact teeth; Group B: access cavities were restored with a traditional resin composite (EsthetX; Dentsply-Italy, Rome, Italy); Group C: access cavities were restored with a bulk fill flowable composite (SDR; Dentsply-Italy), except 1...
January 2016: Annali di Stomatologia
https://www.readbyqxmd.com/read/25625133/randomized-3-year-clinical-evaluation-of-class-i-and-ii-posterior-resin-restorations-placed-with-a-bulk-fill-resin-composite-and-a-one-step-self-etching-adhesive
#13
RANDOMIZED CONTROLLED TRIAL
Jan Wv van Dijken, Ulla Pallesen
PURPOSE: To evaluate the 3-year clinical durability of the flowable bulk-fill resin composite SDR in Class I and Class II restorations. MATERIALS AND METHODS: Thirty-eight pairs of Class I and 62 pairs of Class II restorations were placed in 44 male and 42 female patients (mean age 52.4 years). Each patient received at least two extended Class I or Class II restorations that were as similar as possible. In all cavities, a one-step self-etching adhesive (XenoV+) was applied...
February 2015: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/25582061/bulk-fill-resin-composites-polymerization-properties-and-extended-light-curing
#14
COMPARATIVE STUDY
José Zorzin, Eva Maier, Sarah Harre, Tobias Fey, Renan Belli, Ulrich Lohbauer, Anselm Petschelt, Michael Taschner
OBJECTIVES: The aim was to evaluate the polymerization properties of bulk-fill resin composites using two different light-curing protocols, in terms of degree of conversion (%DC), Vickers hardness (HV), polymerization volume shrinkage (PVS) and polymerization shrinkage stress (PSS) and compare them to conventional condensable and flowable resin composites. MATERIALS AND METHODS: Filtek BulkFill (FBF, 3MESPE, Germany), SDR (Dentsply, Germany), TetricEvoCeram BulkFill (TBF, Ivoclar-Vivadent, Liechtenstein), Venus BulkFill (VBF, Heraeus, Germany), X-traBase (XTB, Voco, Germany), FiltekZ250 (3MESPE) and Filtek Supreme XTE Flowable (FSF, 3MESPE) were investigated...
March 2015: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/24561041/marginal-adaptation-of-class-ii-cavities-restored-with-bulk-fill-composites
#15
COMPARATIVE STUDY
Edson Alves Campos, Stefano Ardu, Dorien Lefever, Fernanda Ferreira Jassé, Tissiana Bortolotto, Ivo Krejci
OBJECTIVES: To determine the marginal adaptation of bulk-fill composites in class II MO cavities. METHODS: Standardized class II MO cavities with bevelled enamel margins were prepared in 40 extracted human molars. The teeth were randomly assigned to one of the five experimental groups (n=8). The teeth were restored with two horizontal increments of composite (4mm and 2mm thickness). The experimental groups were (1st/2nd increment): Gr. A - Venus Bulk-Fill/Venus Diamond; Gr...
May 2014: Journal of Dentistry
https://www.readbyqxmd.com/read/23865582/polymerization-shrinkage-stress-kinetics-and-related-properties-of-bulk-fill-resin-composites
#16
Hm El-Damanhoury, Ja Platt
The present study assessed the polymerization shrinkage stress kinetics of five low-shrinkage light-cured bulk-fill resin composites: Surefil SDR flow (SF, Dentsply), Tetric EvoCeram Bulkfil (TE, Ivoclar Vivadent), Venus Bulk Fill (VB, Heraeus Kulzer), x-tra fil (XF, Voco), and experimental bulk fill (FB, 3M ESPE). Filtek Z250 (FZ, 3M ESPE) was used as a control. Real-time shrinkage stress of investigated composites was measured using a tensometer; maximum shrinkage stress, stress rate (Rmax), and time to reach maximum stress rate (tmax) were recorded...
July 2014: Operative Dentistry
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